Gas-mixer.



PATENTED JULY 14, 1908.

A. L. AVERY.

GAS MIXER.

APPLICATION FILED JAN.16, 1906.

Witnzooao IIIIIWTIWIIIIIIVI! liweutdz AMOS L. AVERY, OF BRADFORD, PENNSYLVANIA.-

specification of Letters Patent.

Patented July 14, 1908.

Application filed January 16,1906. Serial No. 296,336.

To all whom it may concern:

Be it known that 1, Aims L. AVERY, a citizen of the United States, residing at Bradford, in the county of McKean and State of Pennsylvania, have invented certain new and useful Improvements in Gas-Mixers, of which the following is a specification, reference being had therein to the accompanying drawmg.

My invention relates to improvements in gas mixers.

The object of my invention is to provide a mixer of this character in which the gas is fed to the burner in a series of small streams and in which the size of the streams may be readily regulated.

Another object of my invention is to provide a more simple, cheap and effective mixer of this character to accomplish the above mentioned results.

In the accompanying drawings, Figure 1,- is a perspective view of my improved mixer. Fig. 2, is a' vertical longitudinal sectional view of Fig. 1. Fig. 3, is an enlarged side elevation of the controlling stem. Fig. 4, is a transverse sectional view of the stem chamber with the stem therein.

Referring now to the drawings, 1 represents the angle valve which is provided with an o ening 2 in which is screwed 'the gas su p y pipe 3, and cast as a part of the angle va ve is the stem chamber 4 which is externally screw-threaded at 5 for the purpose hereinafter described. The said stem chamber, as shown, is cast as a part of the angle valve, and extends from one end and is of an elongated form. The said stem chamber 4 is provided with an opening 6' extending longitudinally therethrough, which communicates with the angle valve at its inner end. The outer end of said stem within the opening, is provided with an inwardly-extending circumferential flange 7 which forms the contracted portion of the opening, and the inner face of said flange is ground so as to form a tight joint with the valve stem, as will be more fully described. The opposite end of the angle valve is provided with the internally screw-threaded portion 8 on which is screwed the cap 9. The said cap is of an elongated form and is provided with a longitudinallyextending opening therethrough. The inner end of said opening is screw-threaded at 10 to receive the'valve stem, while the outer end is provided with an inwardly-extending flange 11 which serves as a stop to limit the outward movement of the valve stem.

The valve stem, as shown, is composed of an elongated body portion 12 of a len th sufficient to extend through the angle va ve, the stem chamber, and through the cap, and extend a considerable distance therebeyond. The extreme outer end of said stem is beveled at 18 so as to insure it passing through the opening at the end of the stem chamber,

and absolutely preventing it from engaging the flange 7, and thus the stem is guided through the opening within the flange. The said valve stem adjacent the beveled end is provided with four longitudinally-extending semi-circular grooves 14 which gradually diminish in width and depth towards the ends, and while I have shown and described four of these grooves, it is understood that any desired number may be used, either more or less than four. tance from the opposite end, is provided with a screw-threaded portion 15which screws into the internal threads 10 of the cap 9, and thus the valve stem is moved inwardly or outwardly through the stem chamber.

The valve stem, as before stated, extends a distance beyond the cap, and is provided with the squared end 16 which passes through a correspondingly shaped opening 17 in the hand-operating wheel 18. By this structure, it will be seen that the stem is readily rotated, and the valve stem caused to move longitudinally. Thecap 9 is externally screwthreaded at its outer end at 1.9, and upon which a stuffing-box 20 is screwed, said stuffing-box carrylng a packing 21 surrounding the stem, and by means of which a tight joint is made, and the gas prevented from' passing from the valve aroundthe same, yet

allowing the free rotation of the stem, as 18 The said valve stem, a dis out, so that a arger or smaller opening is directly below the flange7, and thus a greater or less amount of gas passes from the stem chamber.

When the valve stem is drawn inward, so that the solid portion 25 between the grooves 14 and the beveled end 13 is opposite the flange 7 of the chamber 4, the gas 18 entirely I spaced a distance from the ends of the stem cut off,

Having thus described my invention, what I claim and desire to secure by Letters Patent, is

1 A device of the character described, comprising an elongated tubular chamber having at its outer end a broad contracted portion forming a reduced ground opening, a

stem of the same diameter throughout its len th exce tat the center, which is rovided wit threa s of greater diameter, t e outer end of the stem assifig through said ground 0 enin and at a 1 times forming a tight joint t erewith, the outer periphery of the stem adjacent its outer end provided with a series of narrow elongated grooves gradually tapering in width and depth towardsthe outer end to a needle opening, said grooves being spaced a distance from the end of the stem to form a .having at its outer end a broad contracted portion forming a reduced ground opening, a stem of the same diameter throughout its length exce t at the center, which is provided with threa s of greater diameter, the outer end of the stem assing through said ground 0 ening and at all times forming a tight joint t erewith, the outer periphery of the stem adjacent its outer end provided with a series of narrow elongated grooves gradually tapering in width and depth towards the outer end to a needle opening, the said grooves'being to form a solid portion to form a tight joint with the ground opening, the inner end of the. chamber havin a supply pipe connection formed integra therewith, an internally screw-threaded portion carried by the inner end of the tube and into which is screwed the threaded portion of the stem for moving the stem in or out, the said tubular chamber inv termediate its ends having threads, and a tubular air-feeding chamber. screwed on said threads of the tubular chamber.

In testimony whereof I aflix my signature in presence of two witnesses.

AMOS L. AVERY.

Witnesses:

G. M. HEDRICH, S. H. BERRY. 

